Slide clasp bag-end opener and closer



March 22, 1960 s. SCHNEIDEMAN I 2,929,123

SLIDE CLASP BAG-END OPENER AND CLOSER Filed July 25, 1957 5A MUEL SCHNEIDE VAN r .as..-- 4

This invention relates to a slidefastener, andmore particularly to a disposable slide fastener for paperbags or the like.

A primary object of this invention is the provision of an improved slide fastener which may be applied to a paper bag, so that the same may be reclosed after initial opening, thus preserving the contents of the bag and obviating the necessity of using the entire contents at one time.

An additional object of the invention is the provision of a simplified fastener of this character which may be simply and inexpensively manufactured, and which is of such relatively low cost that the same may be used once and disposed of, or alternatively, detached from the bag to which it is initially applied and reused if desired.

A further object of the invention is the provision of a device of this character which is relatively simple to apply to or remove from a selected paper bag.

An additional object of the invention is the provision of a device which will provide a relatively tight closure for the bag to which it is applied, which may be opened and closed with a minimum of effort and difliculty.

Still other objects reside in the combinations of elements, arrangements of parts, and features of construction, all as will be more fully pointed out hereinafter and disclosed in the accompanying drawing wherein:

Figure 1 is a side elevational view of the assembled slide fastener detached from a bag.

Figure 2 is a perspective view of the fastener shown as applied to a bag, the fastener being in open position.

Figure 3 is a side elevational view of the slide comprising a portion of the instant invention.

Figure 4 is a rear end elevational view of the slide of Figure 3.

Figure 5 is a front elevational view of the slide.

Figure 6 is a plan view of one of the fastening elements disassociated from a bag.

Figure 7 is a side view of the construction of Figure 6.

Figure 8 is a side view similar to Figure 7, but showing the other element of the fastener.

Figure 9 is a sectional view taken substantially along the line 99 of Figure 7 as viewed in the direction indicated by the arrows.

Figure 10 is a sectional view taken substantially along the line 1010 of Figure 8 as viewed in the direction indicated by the arrows.

Similar reference characters refer to similar parts throughout the several views of the drawing.

Having reference now to the drawings in detail, the slide fastener of the instant invention is comprised essentially of three elements, a movable slide 3, a male interlocking clasp element 4, and a female interlocking clasp element 5.

The slide 3 is comprised of a block-like portion 6, the front end of which is provided with a pair of opposed tongues 7, which are arcuate in configuration, and form an ovoidal opening or slot at the front end of the fastener, which is open at its bottom as at 8. The rear end of the fastener 3 includes a separating tongue 9, which tates Patent 2 isextendedinwardly and downwardly from the rear. edge of block 6, and extends between thetips. oftthemembers 7 into the slot 8.

The male clasp member 4 comprises a plate or sheet, which is provided on its inner surface with ridges l0, and on its upper surface with an arcuate outwardly turned flange or interlocking member 11, which is adapted to coact, in a manner to be more fully described herein-, after with a complementary flangev 12 which is also arcuate in configuration, and which comprises a portion of the female member 5. One end of the member 4 is outwardly bowed, as indicated at 13, and the other, end.-in-: cludes a depending portion 14 which is provided with. an ofiset tang. 15, whichis adapted to engage, in a manner to be more fully described hereinafter about the end. or corner portion of a bag. The member 5is also provided with ridges-1.6, and hasv one end outwardly bowed asat 17, the arcuate configuration of the end 17 being opposite to that of the end 13. The opposite end of the member 5 is also provided with a depending portion 16a, which is provided with a tang or tongue 17a, oppositely disposed to the tongue 15, and also adapted to engage an end portion of the bag.

The member 5 is also provided with an upwardly extending finger engaging portion 18, which is outwardly bowed at its extremity 19, in order to facilitate disengagement of the complementary arcuate flanges 13 and 17.

In the use and operation of the device, the two complementary members 4 and 5 are attached to opposite sides of the separated edges 21 and 22 of an opened bag 20,

arranged in open position, as indicated in Figure 2. The slide 3 is in the position shown, and the opened end portions may be separated as indicated. When the slide is moved to the left as viewed in Figure 2, the arms 7 coact with the flanges 11 and 12 to cause the flange 12 to overlap and encircle the flange 11, thus effecting a relatively tight closure of the bag structure. When it is desired to open the bag, the slide is moved again to the position as shown in Figure 2, during which operation the tongue 9 serves to disengage the flanges 11 and 12, whereupon the bag may be readily separated by means of a finger engaging member 18.

The tongues or tangs 15 and 17 serve as a stop member to prevent disengagement of the slide 3 from the complementary clasp members when moved in one direction, while the outwardly flared ends 13 and 17 serve to prevent the total disengagement of the slide when moved in the opposite direction.

The complementary fastener members 4 and 5 may be secured to the top of the bag along its edges in any desired manner, as by means of a suitable adhesive. The

device is preferably constructed of an inexpensive material, such as plastic, or relatively light metal, and is relatively inexpensive so that it may be employed only once if desired, and disposed of, or alternatively may be removed from the bag to which it is initially applied and reutilized as desired.

From the foregoing it will now be seen that there is herein provided an improved slide fastener, which accomplishes all of the objects of this invention, and others, including many advantages of great practical utility and commercial importance.

As many embodiments may be made of this inventive concept, and as many modifications may be made in the embodiment herein before shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative and not in a limiting sense.

I claim:

In a slide fastener the combination of male and female interlocking fastening elements, each comprised of an elongated strip adapted to be adhesively secured to an edge of a bag to be closed, each strip having a downwardly reverted arcuate flange, the flange on the female element being of greater cross sectional extent than the flange of the male element and adapted to envelope the latter, and a slide member movable on said strip, said slide member including a block portion and a pair of arcuate converging closing arms forming an ovoidal opening and having a slot at its lower edge, said opening being of a dimension to compress the flange of the female element about the flange of the male element when said slide is moved in one direction, and 21 depending opening tongue at the other end of said block extending to a point in alignment with and below the slot formed by the ends of said closing arms, adapted to disengage said male and female flanges when said slide is moved in the opposite direction, the adjacent ends of said fastening elements at one end being oppositely outwardly flared to provide a stop for said slide, the other ends of said fastening elements having tangs thereon to form a stop for said slide at said other end, and a finger engaging tongue disposed centrally on one of said elements.

References Cited in the file of this patent UNITED STATES PATENTS Freedman Ian. 24, 1939 Dobbs July 11, 1950 Madsen Oct. 14, 1952 Ponx -2 Aug. 23, 1955 Morner Ian. 15, 1957 Post Apr. 23, 1957 FOREIGN PATENTS Australia Mar. 25, 1955 Austria Apr. 25, 1953 Belgium Nov. 30, 1951 France Feb. 16, 1948 France Mar. 18, 1953 France Oct. 1, 1956 France Nov. 5, 1956 

